Noclue ive been tunning them like this since i bought my green one above^^^^. Maybe its 10.5". But no wear or any effects on tires.

Front 275-40-20
Bck. 315-35-20

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Call Me For Tires: 732-421-6931
Past
2000 E46 325i
2006 E53 4.4i Sport
2006 X5 4.8is
2011 E90 328xi
2011 E71 50i Fully Loaded :thumb up:
Current
2000 E39 528i
2013 F10 M5
2013 F10 535xi
2017 X3
2017 Sedona
2017 Optima
2016 Fiesta